Radiation from transmission lines

V. Karapetoff: On the second page of Dr. Manneback\´s paper, on the top of the second column, three conclusions are drawn. The first conclusion is that: “An electric disturbance, i.e., a discontinuity of voltage or current, is always propagated along any line at the constant speed ” And then he adds: “whether there is resistance and leakance or not”. I am not sure that this is correct; it seems to me that the velocity of propagation depends on the presence of resistance and leakance and is thereby reduced.